Machine for drilling eyeglass-lenses



(No Model.)

W. A. PEGK. MACHINE FOR DRILLING EYEGLASS LENSES. No. 596,537. Patented Jan. 4, 1898.

Wane/sow UNITED STATES PATENT OFFICE.

WILLIAM A. PEOK, OF CHICOPEE, MASSACHUSETTS, ASSIGNOR TO ORVIS W. BULLOCK, OF SPRINGFIELD, MASSACHUSETTS.

MACHINE FOR DRILLING EYEGLASS-LENSES.

SPECIFICATION forming part of Letters Patent No. 596,537, dated January 4, 1898.

Application filed February 16, 1897. Serial No, 623,625. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM A. PEOK, a citizen of the United States of America, residing in Chicopee, in the county of Hampden and State of Massachusetts,have invented new and useful Improvements in Machines for Drilling Eyeglass-Lenses, of which the following is a specification, reference being had to the accompanying drawings and letters of reference markedthereon.

Machines heretofore used for drilling lenses have been defective because of not being convenient to use and because no'provision has been made whereby the delicate touch or feel requisite for the proper-drilling of an opening in glass could be had.

The object of my invention is to provide an apparatus which while overcoming the objectionable features which have heretofore obtained will be convenient to use, readily adjustable, and a device by which the work can be rapidly, easily, and accurately performed without danger of splintering or cracking the glass; and my invention consists in the construction and arrangement herein described and referred to by which the objects of my invention are obtained.

In the accompanying drawings, in which like letters of reference indicate like parts, Figure 1 is a perspective view of one of .the simplest forms of construction of my device. Figs. 2 and 3 are perspective views of the interchangeable tables. Figs. 4 and 5 are views of removable posts or stumps; Fig; 6,

a view of a drill; Fig. 7, a side view of a porin which is supported the table and the drill= carrying stem.

0 indicates a vertical projection through which the drill-stem or spindle passes; d, the drill-stem or spindle; e, clamping-screw; 71, crank-handle; i,plane-faced table 3', table provided with a ledge; k, ledge on table 7'; Z, an opening in the table; m and 'n,interch angeable posts or stumps; o, a drill; 1), adj usting-screw; r, lever; s, a spring mounted below the tablestem, and If an interiorly-threaded collar.

The construction and operation of my de vice will be readily understood on reference to the drawings, wherein is shown in Fig. 1 one of the simplest forms of construction, the

body consisting of a lower part a, provided with clamping-screw 6, having a finger-piece g, and the upper part I) being shaped to overhang, as shown, and having an upward extension 0, provided with an opening to form a bearing for the drill-stem or spindle d. An opening is formedin the frame below in the line of the drill for the reception of a tablestem, so that the table may be readily placed in position or removed and another'substituted.

The table which is especially designed and adapted for the drilling of openings in eyeglass-lenses, as illustrated in Figs. 2 and 3, shows a table having a plane 'top. The table j is provided with a ledge or'abutment k, the vertical face of which ledge is at the proper distance from the center line, so that if the eyeglass-lens be placed with its end bearing against the ledge and the drilling operation on one side be commenced the hole will be below the surface the lens is removed, the

stump m taken out, and the stump n substituted, the latter being provided with a cone shaped or tapering point which, of course, bearing in the opening already formed by the drill, brings this opening in exact alinement with the drill, so that as the drilling operation is continued from the opposite sideof the it covered more surface.

glass the handle h is revolved, at the same time bearing down gently but steadily to give feed to the drill-bit. The supporting-stump m referred to being under the point of the drill-bit only furnishes a bed less liable to cause breaking of the glass than -,it would if The shape of the lens'being oval and varying it'wouldbe difficultto formzauy bed orsupport which would fi-t theva'ryin'g curvature of lenses. If,-however, the lens were flat, then a bed largerithan the drill-bit might beemployed.

To prevent alldangerof rotation of thetabljes inthe .frame, Iprovidea setascrew'u, the end of which-bears against the tables-stem.

For the purposes of accurate vertical adjustment and v.to move the :table toward or from the drill a minute distance I provide-a construction as illustrated in Fig. '7, the:ta-'

ble-stem being provided with .an inclined lateral recess orcountersinlgand an adjustingscrew 19 being provided with a cone-shaped point engaging the inclined recess inath'e stem so that as the adjusting-screw is :turn'edits tapering point bears against the incline in the table-stem andforces the stem and table upwardly. It will .be observed, however, that the movement of the table will be extremely slight, notwithstanding the fact that a considerable turn may be given to the screw.

It will beobserved that as the crank is revolved by hand :the cutting of the :drilfwill be readily communicated to the h'andzan'd that the pressure may be regulated so-=as to avoid d angerrof :splin-terin g or breaking of the glass.

For'the purpose of providing'an'other means of feeding and also of verticallyadjiusting the drill-spindle to the desired position I;provide a construction as illustrated in Fig. '8, wherein: a collar 15 engages an annular 1 recess. in the spindle d, and the collar is interiorly threaded to .en-gage a like exterior thread upon; the part c of the stem, and it will be readily. seen that-as this collar is revolved it, together with the stem d, will be vmoved in a direction dependent upon the direction of revolution .of the-collar. In the said figure I'illustrate ameansof moving thetable bythe em-' ployment of -a lever a", the same being pivots ally mounted in the'frame, as shown,-and the inner end engaging the-tablestem in :aslot,

anda springs being arranged below the innerend of the lever to throw the same upwardly. The spring, however, it will be observed, is not a necessary element to the operation of the lever.

Fig. 9-is an edge View of the construction shown inFig. 8, wherein the slotted stem is seen through the opening, the lever being removed. It will be seen that if desired a pulley may be mounted on the drill-spindle d and the feed operate as illustrated.

Having therefore described my invention, what 'I claim, and desire to secure by Letters Patent, is

1. In -a lens-drilling apparatus, a suitable frame, a drill stem mounted revolubly in the frame; a removable table arranged in the frame below the drill-stem; and aremovable post inthe table, substantially as shown.

.2. In .a. lens-drilling apparatus-the combination of 'asuitable frame, a drill-spindle mounted therein, means for revolving the spindle, a table toward which thespindle can be advanced, asquare-faced' post removably mounted in the table, anda cone-shaped post adapted tobe substituted for the first-named post,substantially :as described. 7

3. The combination of a suitable frame adapted to be clamped-tea bench; adrillspindle mountedtherein .a removable table mounted in'the frame; a squarefaced post removably mounted in the table; a coneshaped post adapted to be substituted for the first-named post, and means to feed the drill and table toward each other, substantiallyas shown.

4. In a lens-drilling apparatus, the combination of a frame, a drill-spindle revolubly m'ountedbtherein, said frame having a socket in line with saidspindle, a table having a post in said socket, and a spring in said socket below said post arranged to normally-sustain said table a short distance abovesaid' frame, substantially .as described.

v5. In .a'lens-drilling apparatus, the combination ofra "frame, a drill-spindle revolubly mounted therein, said frame having a socket 'in line with saidspindle, and a lateral aperture opening from'said socket to the side of :the frame, a table having :a post in said socket, a lever extending through said aperture intov said socket below said post, and a spring in said socket below said post arranged tonormally sustain said table a short distance above said frame, substantially as described.

\VILLIAM A. PEOK.

Ito 

